Home / 3,840.21-5,299.71-2,161.68

Finding the Fourth Proportional to 3,840.21, 5,299.71 and 2,161.68

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Solution

The fourth proportional to 3,840.21, 5,299.71 and 2,161.68 is: 2,983.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,840.21 : 5,299.71 = 2,161.68 : x
  2. Step 2: Convert to fraction form
    3,840.21/5,299.71 = 2,161.68/x
  3. Step 3: Cross multiply
    3,840.21x = 5,299.71 × 2,161.68
  4. Step 4: Simplify right side
    3,840.21x = 11,456,277.11
  5. Step 5: Solve for x
    x = 11,456,277.11/3,840.21
  6. Step 6: Final answer
    x = 2,983.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.